[1] : The Collaborative International Dictionary of English v.0.48

edelweiss \e"delweiss\, n. g., fr. edel noble + weiss white.
   bot.
   a little, perennial, white, woolly plant leontopodium
   alpinum, growing at high elevations in the alps. it is the
   national flower of austria.
   1913 webster +pjc
see also:
leontopodium alpinum 

[2] : WordNet (r) 2.0

edelweiss
     n : alpine perennial plant native to europe having leaves
         covered with whitish down and small flower heads held in
         stars of glistening whitish bracts syn: leontopodium
         alpinum
see also:
leontopodium alpinum 

Edelweiss >> E Words
Edelweiss, definition of term: Edelweiss
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